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US1662858A
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Automatic control device for electric-arc-welding apparatus
Assignee: Individual
•
Filing: 1925-09-21
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Granted: 1928-03-20
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Expires: 1945-09-21
Abstract
No abstract record available.
Inventors
- 👤 Hume Walter Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:22
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/133; B23K9/1336; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-03-20 | 1931-09-19 | 1932-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-20 | 1935-09-19 | 1936-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-20 | 1939-09-19 | 1940-03-20 | $7700.00 | Window Closed / Lapsed |